diff --git a/system-environment/config.nix b/system-environment/config.nix
index 2a6949f..74680ac 100644
--- a/system-environment/config.nix
+++ b/system-environment/config.nix
@@ -27,17 +27,12 @@ in
 
         # Ada/+Spark & Rust tools
         alire
-        gnat15
-        gnat15Packages.gprbuild
-        gnat15Packages.gpr2
-        gnat15Packages.gnatprove
-        gnat15Packages.gnatcoll-core
-        gnat15Packages.gnatcoll-readline
-        gnat15Packages.gnatcoll-python3
         rustc
         cargo
     ];
 
+    programs.nix-ld.enable = true;
+
     environment.variables = {
     };